CN102456461A - Superconducting magnet coil support with cooling and method for coil-cooling - Google Patents

Superconducting magnet coil support with cooling and method for coil-cooling Download PDF

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Publication number
CN102456461A
CN102456461A CN2011103448355A CN201110344835A CN102456461A CN 102456461 A CN102456461 A CN 102456461A CN 2011103448355 A CN2011103448355 A CN 2011103448355A CN 201110344835 A CN201110344835 A CN 201110344835A CN 102456461 A CN102456461 A CN 102456461A
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cooling
coil
cooling water
fluid
water pipes
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CN2011103448355A
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CN102456461B (en
Inventor
江隆植
C·小金弗里达
N·克拉克
W·沈
E·W·斯陶特纳
T·张
R·麦唐纳
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General Electric Co
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General Electric Co
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/3804—Additional hardware for cooling or heating of the magnet assembly, for housing a cooled or heated part of the magnet assembly or for temperature control of the magnet assembly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F6/00—Superconducting magnets; Superconducting coils
    • H01F6/04—Cooling

Abstract

A superconducting magnet coil support with cooling and a method for coil cooling are provided. One superconducting coil support arrangement includes a superconducting coil and at least one support beam supporting the superconducting coil and defining a tank for storing a cooling fluid therein. The superconducting coil support arrangement further includes a plurality of cooling tubes coupled to the superconducting coil and connected to the at least one support beam, wherein the plurality of cooling tubes are configured to transfer the cooling fluid therethrough.

Description

The method that has the superconduction magnet exciting coil supporting mass of cooling and be used for the coil cooling
Technical field
The disclosed theme of this paper relates generally to superconducting magnet, and more particularly, relates to the system and method that is used to cool off superconducting magnet.
Background technology
Use the helium container that superconducting coil (for example, constituting the superconducting coil of magnetic resonance imaging (MRI) magnet) is carried out sub-cooled.The low-temperature cooling system of the some of them of these MRI systems comprises cold head (coldhead), and it is operable to the refrigerant of having vaporized of condensing again during system operation, to continue cooling superconduction magnet exciting coil.
In addition, these MRI magnets during coil is energized, possibly stand big axially with electromagnetism (EM) power radially.In the MRI system, magnet exciting coil possibly be from supporting diametrically.But in the axial direction, because active force between very big coil, magnet exciting coil need have the supporting mass through linking with supporting structure (for example, bobbin) in coil edge.
When magnet exciting coil during for example energizing during radial expansion, owing to the stick-slip between coil supports body and the magnet exciting coil generates and discharges frictional heat.The heat that generates possibly make that the regional area of coil is overheated, and constitutes normal area (normal zone), and wherein conductor is lost the superconduction attribute, and is converted to the normal resistance state.This normal area will be owing to Joule heat and heat conducting former thereby be diffused into whole winding, and this causes quench incident (quench event).This quench is followed with the quick boiling of helium and from the refrigerant pond of submergence magnet exciting coil, is overflowed.Each quench refills magnet and reinforced (re-ramp) again then, and this is a thing with high costs and consuming time.
Used different apparatus and method with cooling coil during startup and steady state operation.For example, used different conduction cooling meanss.But these conduction cooling meanss are owed efficient.
Summary of the invention
According to various embodiments, a kind of superconducting coil support arrangement is provided, it comprises: superconducting coil and at least one support column, this at least one support column supporting superconducting coil also limits the jar that wherein is used to store cooling fluid.This superconducting coil support arrangement also comprises: be coupled to superconducting coil and be connected to a plurality of cooling water pipes of at least one support column, wherein, a plurality of cooling water pipes are configured to through wherein transmitting cooling fluid.
According to other embodiment, provide a kind of multistage cooling that is used for superconducting magnet to arrange.This multistage cooling is arranged and is comprised: wherein have cooling fluid a plurality of liquid cools jars, be coupled to the cold head that a plurality of cooling water pipes and being configured to of the coil of superconducting magnet condense the cooling fluid of boiling again.This multistage cooling is arranged and is also comprised heat shield and be connected between a plurality of cooling water pipes and (i) be directly connected to cold head or (ii) be connected to the fluid partitioning device of cold head through heat shield.
According to more another embodiment, a kind of method that is used to cool off the coil of superconducting magnet is provided.This method comprises: a plurality of cooling water pipes are coupled to the coil of superconducting magnet and constitute at least one coil supports body, the coil that this at least one coil supports body wherein has the cooling fluid jar and is configured to support superconducting magnet.
Description of drawings
Fig. 1 constitutes, is used for the simplified block diagram of the integrated coil frame that has cooling of superconducting coil magnet according to various embodiments.
Fig. 2 is the simplified block diagram of diagram according to magnetic resonance imaging (MRI) magnet system of the cooling layout of various embodiments formation.
Fig. 3 is illustrating of the MRI magnet system arranged of cooling that diagram constitutes according to various embodiments.
Fig. 4 is the decomposition diagram according to the integrated coil frame that has cooling of various embodiments formation.
Fig. 5 is the perspective view according to the integrated coil frame that has cooling of various embodiments formation.
Fig. 6 is the perspective view according to the single coil with cooling water pipe of various embodiments formation.
Fig. 7 is the profile of the integrated bobbin of Fig. 5 and Fig. 6.
Fig. 8 is the perspective view of diagram according to the integrated coil frame of the cooling path of various embodiments formation.
Fig. 9 is the perspective view that diagram is removed the integrated coil frame of cooling path under the situation of coil, that constitute according to various embodiments.
Figure 10 is the perspective view of diagram according to the integrated coil frame of the heat shield of various embodiments formation.
Figure 11 is the schematic block diagram according to the thermal siphon cooling circuit of various embodiments formation.
Figure 12 is a diagram according to the block diagram of cold head various embodiments, that supply with from the heat shield receiver gases.
Figure 13 is the diagrammatic sketch of the MRI system that arranges of the cooling that wherein can realize constituting according to various embodiments.
Embodiment
When combining advantages, with the following detailed of understanding preamble general introduction and some embodiment better.With regard to the sketch map of the functional block of accompanying drawing diagram various embodiments, these functional blocks are not necessarily indicated the division between the hardware.Therefore, for example wherein one or more of these functional blocks can realize in single piece of hardware or many hardware.Should be appreciated that various embodiments is not limited to layout shown in the accompanying drawing and implementation.
Just as used herein, element or the step quoted from singulative or indefinite article " " beginning are interpreted as not getting rid of a plurality of said elements or step, have only pointed out this type of eliminating clearly.And, the citation of " embodiment " is not intended to be interpreted as the existence that the extra embodiment of the characteristic of being quoted from is also incorporated in eliminating into.And, only if point out on the contrary clearly,, " comprising " or " having " can comprise this type of the extra unit that does not contain this attribute otherwise containing the embodiment of one or more elements of specific object.
Various embodiments is provided for cooling off superconducting magnet, be specially the coil that reduces superconducting magnet energize like it or steady state operation during the system and method for the heat that generates.Through put into practice these embodiment at least one of them, provide the magnet cooling that reduces complexity to arrange, so that reduce the possibility and the cost thereof of helium forfeiture (for example, between boiling period).
Various embodiments comprises the thermal siphon cooling/heat exchange layout of the coil that cools off superconducting magnet.Superconducting magnet in the magnetic resonance imaging that is used for having the helium cooling coil (MRI) system, the thermal siphon in the various embodiments are arranged and are used convection current and conduction cooling.Also use the part of coil support structure, wherein use the helium of boiling to make system's (comprising heat shield) cooling, and also the helium that seethes with excitement is condensed into liquid helium again as cooling circuit.
Describe though should be noted that the superconducting magnet that some embodiment can combine to be used for the MRI system, the system that various embodiments can combine to have any kind of superconducting magnet realizes.These superconducting magnets can realize in the medical imaging apparatus of other types and non-medical imaging apparatus.
As shown in Figure 1, the cooling that constitutes according to various embodiments, be used to cool off superconducting magnet arranges that 20 comprise: the cooling path 22 (for example, cooling circuit) that provides with coil supports body 24 (for example, bobbin) combination.The shape and size of coil supports body 24 are made as one or more coils 26 of supporting superconducting magnet.Coil supports body 24 can be the integrated coil frame that for example has cooling.Therefore, coil supports body 24 provide one or more coils 26 structure support (for example, to from axially with the supporting of radially active force), and the cooling path that also is provided for cooling off one or more coils 26.
The part that various embodiments can be used as Fig. 2 and MRI magnet system 30 shown in Figure 3 realizes, wherein, arranging through two levels of thermal siphon cooling provides cooling.Should be noted that in institute's drawings attached the part that similar numeral is similar.
Specifically, provide two paths fluid (being specially helium) to be delivered to the cold head 32 of magnet system 30.In this embodiment, use the fluid between the fluid partitioning device 35 control first order and the second level to flow.Fluid partitioning device 35 is connected to heat shield 36 and cold head 32 with helium container 34 (and specifically, having the cooling path 22 (shown in Fig. 1) of the integrated coil frame 24 of helium container 34).Helium container 34 can by as one or more jar described herein constitute (it can be liquid tank or gas tank), these one or more jars constitute the part of integrated coil frame 24 with one or more paths 37.Describe in more detail as this paper, heat shield 36 comprises that the convection current cooling arranges.
The container 34 of MRI magnet system 30 is being adorned liquid cryogen, like liquid helium.Helium container 34 is also surrounded by vacuum tank 44, comprises heat shield 36 in the vacuum tank 44 and/or between it.Heat shield 36 can be that the heat that for example has convection current cooling described herein is isolated radiation shield.
Cold head 32 as subcolling condenser (cryocooler) in the various embodiments passes vacuum tank 44 extension in cold head sleeve pipe 46 (for example, housing).Thus, can the cold junction of cold head 32 be placed in the cold head sleeve pipe 46 and can not influence the vacuum in the vacuum tank 44.Use any suitable device (for example, one or more flanges and bolt or other devices as known in the art) that cold head 32 is inserted (or taking in) and be fixed in the cold head sleeve pipe 46.And, the motor 48 of cold head 28 is provided outside vacuum tank 24.
Cold head sleeve pipe 46 comprises the openend that gets in the helium container 34.As shown in Figure 3, the cold head 32 in the various embodiments comprises condenser 50 in the lower end of cold head 32 again, and the lower end of cold head 32 has the part in openend extends into helium container 34 when cold head 32 being inserted and be accommodated in the cold head sleeve pipe 46.Condenser 50 will condense from the helium of the boiling of helium container 34 more again.The condenser again 50 that is coupled to helium container 34 through one or more paths 38,40 and 42 allows and will be delivered to condenser 50 from the helium of the boiling of helium container 34 again, and then the helium liquid transfer that condenser 50 will condense again is to helium container 34.
In various embodiments, superconducting magnet 52 is the superconducting magnets that are made up of one or more coils 26, and it is located in the helium container 34, and is being controlled to obtain the MRI view data during the MRI system operation in greater detail like this paper.In addition, in the operating period of MRI system, the liquid helium cooling superconducting magnet 52 in the helium container 34 of MRI magnet system 30, as known, superconducting magnet 52 can be configured to coil groups.For example, superconducting magnet 52 can be cooled to superconducting temperature, like 4.2 Kelvins (K).Cooling procedure can comprise by the helium with boiling of condenser 50 again and condenses into liquid again and it is turned back to helium container 34.
Specifically arrange that with reference to the two-stage cooling as shown in the figure, fluid passage 38 is connected the cooling path 22 of coil supports body 24 with fluid partitioning device 35, it can operate the amount that is delivered to the helium flow body of heat shield 36 and/or cold head 32 with control.Fluid partitioning device 35 can be the multiple valve with two outputs, and fluid passage 40 is connected to heat shield 36 with fluid partitioning device 35, and fluid passage 42 is connected to cold head 32 with fluid partitioning device 35.Should be noted that in Fig. 3 fluid passage 38,40 and 42 can be made up of (diagram respectively is two passages) a plurality of passages
Thus, in operation, the amount of the helium flow body between distribution and the control first order (heat shield level) and the second level (to the cold head 32) and mobile is arranged in two path coolings.Therefore, in the first order, at first will be from the helium cooling in cooling path 22 by heat shield 36, by cold head 32 it is condensed again then.In the second level, directly will condense again and at first through heat shield 36 from the helium in cooling path 22 by cold head 32.
Should be noted that by fluid partitioning device 35 and be delivered to heat shield 36 and/or cold head 32 and/or the amount of the helium flow body that between heat shield 36 and/or cold head 32, transmits can be according to expecting that maybe needs change.For example, can equal percentage or not equal percentage with the part of helium flow body be directed to heat shield 36 and cold head 32 both, it all is directed to heat shield 36 or all is directed to cold head 32.Selectivity operation that can automatic or manual control fluid separator 35.In addition, can also dynamically adjust the amount of the helium flow body that is directed to heat shield 36 and cold head 32.
Fig. 4 illustrates according to various embodiments integrated coil frame 60 that constitute, that have cooling in Fig. 6.Integrated bobbin 60 comprises: be made as and a plurality of coils 26 hot linked a plurality of cooling water pipes 62 that constitute magnet 52.In illustrated embodiment, cooling water pipe 62 twines and is coupled to each of a plurality of coils 26, like more clear (being illustrated as single coil 26) that illustrates among Fig. 6.Cooling water pipe 62 can be made up of any suitable material; (for example, machanical fastener (for example also to use the fastener that is fit to like metal (for example, copper, stainless steel, aluminium etc.); Bolt) or adhesive (for example, hot epoxy resin) it is coupled to the outer peripheral edges of coil 26.Cooling water pipe 62 can also form has difformity and size.
Cooling water pipe 62 also comprises one or more ports (for example, illustrating entrance and exit).Port 64 allows fluid to get into and leave each cooling water pipe 62, so that the fluid stream through cooling water pipe 62 to be provided.These ports 64 also allow the interconnection between a plurality of cooling water pipes 62 corresponding with a plurality of coil 26.
Integrated bobbin 60 also comprises a plurality of horizontal expansion supporting masses 66 that are coupled to a plurality of coils 26 that have cooling water pipe 62.For example, can provide four supporting masses that separate 66 to limit coil groups or coil tube.In certain embodiments, supporting mass 66 is the hollow posts that are made up of suitable material (for example, metal), and can be coupled to a plurality of coils 26.For example, in an illustrated embodiment, can use groove or interference engagement (interference fit) that three supporting mass 66a-c (as shown in Figure 4) are coupled to a plurality of coils 26.Can last supporting mass 66d be coupled to a plurality of coils 26 with difference or append mode, to provide more firm and lasting attached, for example through welding.
The port 64 of each cooling water pipe 62 can be disposed for being connected to wherein one or more of supporting mass 66, for example, limits the supporting mass 66a-c (as shown in Figure 5) of liquid tank.Thus, provide chamber (qualification liquid tank) in hollow supporting mass 66a, 66b and the 66c, turn back to the fluid passage of supporting mass 66d (qualification gas tank) again via cooling water pipe 62.The hollow supporting mass 66a-66d that in various embodiments, limits jar constitutes helium container 34 (as shown in Figure 2).
Integrated bobbin 60 can also comprise another group cooling water pipe 68, and another group cooling water pipe 68 can be filler line or closed cooling system.Cooling water pipe 68 in the illustrated embodiment is connected to different cooling systems, and this different cooling system can comprise that different fluids maybe can be connected to the various bearing body.Cooling water pipe 68 can be operating as cooling water pipe in advance, cooling water pipe circulation in advance and cooling water pipe 62 different fluids (for example, liquid nitrogen (LN 2)), and can be configured to and coil 26 adjacent or adjacency.
For example, cooling water pipe 62 can circulate from the helium of the boiling of MRI system, like this paper in greater detail.Can be the cooling water pipe 68 of the cooling water pipe in advance liquid nitrogen that can circulate, and store heat energy, for example before the helium of the cooling water pipe 62 of flowing through absorbs heat and transmits heat, absorb heat and transmit heat from a plurality of coils 26 as container.Cooling water pipe 62 can be filled with high heat capacity refrigerant, improves heat transfer so that constitute thermal cell.Should be noted that supporting mass 66 can limit the different jars that wherein have different fluid or gas and be connected to different cooling water pipes.
The additional structural supporting member can be provided.For example, can a plurality of supporting masses 70 that separate circumferential extension be connected between the support column 66.Should also be noted that cooling water pipe 68 can adopt rigid manner to constitute, so that alignment and a plurality of coils 26 of axially mounting (for example, operating as stop) to be provided.
Therefore, as illustrate configuration shown in Figure 7 of six coils 26, the outer peripheral edges of cooling water pipe 62 round coil 26 are provided, and use adhesive (for example, glue) that it is coupled to support column 66.Fig. 7 equally more is shown clearly in the chamber 74 in the support column 66.
Like Fig. 8 and shown in Figure 9, can extra cooling duct be provided through the cooling water pipe 76 of one or more circumferential extensions, (shown in figure 10) can be extended round the periphery of heat shield 36 in this extra cooling duct.Cooling water pipe 76 can also be connected to wherein one or more of support column 66, for example is connected to support column 66b and 66d, so that the helium flow warp wherein.Configurable for supplying with port (for example, LN 2Cool off port in advance) the port (not shown) also can be connected to cooling water pipe 76, to supply with cooling fluid or from cooling is arranged, to remove cooling fluid.Thus, heat shield 36 uses the convection current cooling down operation, and this can simplify the design of cold head sleeve pipe 46, and allows heat shield 36 thinner.
Various embodiments can provide the thermal siphon cooling to arrange 80, and is shown in figure 11.Thermal siphon cooling arranges that 80 can limit thermal siphon cooling circuit or system, and wherein helium flow is through supporting mass 66a-c (qualification liquid tank), and flows into then and flow through around the cooling water pipe 62 of coil 26.From wherein removing heat, and liquid helium becomes helium, its possibly released (for example, quench is released).In addition, helium is directed to one of following: be directed to the heat shield 36 that limits the first order and/or directly be directed to and limit partial condenser again 50.Cooling from heat shield 36/release also is provided.Should also be noted that in illustrated embodiment cold head 32 does not comprise cold head sleeve pipe 46.
In addition, controller 82 is provided, it controls flow to the amount of the fluid of the first order and partial each grade.Controller 82 can control flow to the amount of the fluid of the first order and partial each grade automatically like the operating conditions (for example, coil is energized or stable state) based on the measurement temperature or the MRI system of coil 26.
When passing through (ride-through) situation or cold head 32 and need close, cold head 32 possibly be added to refrigerant with the parasitic heat load of non-expectation with cold head sleeve pipe 46.Therefore, in various embodiments, by controller 82 drive fluid separators 35 optimally to distribute across heat shield 36 with via the partial stream of cold head 32.
According to various embodiments, a kind of for example cooling layout of the superconducting magnet of MRI system that is used for is provided thus.This cooling arranges and comprises the integrated coil frame that it has cooling and the optional convection current cooling on heat shield.In addition, also provide two-stage controlled cooling configuration.
Figure 12 illustrates cold head 32 and supplies with (for example, the helium of boiling) from heat shield 36 (as shown in Figure 2) receiver gases.For example, cold head 32 can be the cold head of pulse tube cooler type or 4KGifford-McMahon (Ji Fude-McMahon (GM)) type.In this configuration, the pipe 84 that receives exchanging gas from heat shield 36 can be used for helium efficiently and cool off in advance, and improves liquefaction speed thus.The first order 88 (comprising regeneration organ pipe 91) as shown in the figure, that heat exchanger 86 is arranged round subcolling condenser, and heat exchanger 90 is round the regeneration organ pipe 92 of the second level of arranging towards the subcolling condenser of heat shield 36 94.Thus, can helium 96 be incorporated into the first order 88 from heat shield 36.Can cool off the helium 96 that communicates through heat-shift as described herein by regenerator 50 then.For example, use the thermo-contact with regeneration organ pipe 92, can heat-shift, and by condenser 50 again helium 96 is condensed again.
Various embodiments can combine dissimilar superconducting coil (for example, the superconducting coil of MRI system) to realize.For example, various embodiments can realize with the superconducting coil that MRI system shown in Figure 13 100 uses.Be illustrated as the single mode imaging system though be to be appreciated that system 100, various embodiments can realize or combine with it realizing in multi-mode imaging system.System 100 is illustrated as the MRI imaging system; And can make up with dissimilar medical imaging systems; For example, maybe can generate especially any other system in combination of people's image with computer chromatographical X-ray photography (CT), positron radiation tomography (PET), single photon radiation computer tomography (SPECT) and ultrasonic system.In addition, various embodiments is not limited to be used for the medical imaging system to the human subjects imaging, but can comprise animal doctor system or the non-medical system that is used for imagings such as non-human object, luggage.
With reference to Figure 13, MRI system 100 generally comprises imaging moiety 102 and processing section 104, and processing section 104 can comprise processor or other calculating or control device.MRI system 100 comprises the superconducting magnet 52 that is made up of coil (for example, as the coil that has the bobbin upper support of cooling described herein) in frame 106.Helium container 34 (it can be container and be also referred to as cryostat) is also filled with liquid helium round superconducting magnet 52.Can use liquid helium to cool off the coil of superconducting magnet 52, it comprises liquid helium is provided to cooling water pipe, as this paper in greater detail.Round the outer surface of helium container 34 and the inner surface of superconducting magnet 52 insulation 112 is provided.A plurality of magnetic gradient coils 114 are provided in superconducting magnet 52, in a plurality of magnetic gradient coils 114, RF transmitting coil 116 are provided.In certain embodiments, can adopt and transmit and receive coil and substitute RF transmitting coil 116.Assembly in the frame 106 generally constitutes imaging moiety 102.Though it is cylindrical should be noted that superconducting magnet 52, also can use the magnet of other shapes.
Processing section 104 generally comprises controller 118, main field control 120, gradient fields control 122, memory 124, display unit 126, send-receive (T-R) switch 128, RF reflector 130 and receiver 132.
In operation, the health with object (patient that for example, form images or manikin) places in the hole 134 on the suitable supporting mass (for example, patient table).Superconducting magnet 108 produces the even and static main field B in crosscut hole 134 0In the hole 134 and correspondingly the intensity of the electromagnetic field in patient's body is controlled through main field control 120 by controller 118, and controller 118 is also controlled the supply to the energized current of superconducting magnet 52.
The magnetic gradient coil 114 that comprises one or more gradient coil elements is made as can be along any one or a plurality of direction of three orthogonal direction x, y and z to magnetic field B in the hole 134 in the superconducting magnet 108 0Apply magnetic gradient.Magnetic gradient coil 114 is energized by gradient fields control 122, and also by controller 118 controls.
Be arranged to launch magnetic field impulse and/or the receiving coil element surface coils of RF receiving coil (as be configured to) also is provided if can comprise the RF transmitting coil 116 of a plurality of coils, then detect MR signal alternatively simultaneously from the patient.The RF receiving coil can be any kind or configuration, for example independent receiving surface coil.This receiving surface coil can be the RF coil array that provides in the RF transmitting coil 116.
RF transmitting coil 116 and this receiving surface coil selectively are interconnected to one of them of RF reflector 130 or receiver 132 respectively through T-R switch 128.RF reflector 130 is controlled by controller 118 with T-R switch 128, so that RF reflector 130 generates RF field pulses or signal and optionally the patient applied to excite the magnetic resonance among the patient.When the patient is applied the RF excitation pulse, also actuate T-R switch 128 so that receiving surface coil and receiver 132 are broken off.
After applying the RF pulse, actuate T-R switch 128 once more so that RF transmitting coil 116 and RF reflector 130 are broken off, and the receiving surface coil is connected to receiver 132.The MR signal that this receiving surface coil executable operations produces with the nucleon that detects or sensing is excited in patient's body, and these MR signals are sent to receiver 132.Again the MR signal of these detections is sent to controller 118 then.Controller 118 comprises for example processor (for example, image reconstruction processor), and this processor control MR Signal Processing is to generate the signal of expression patient image.
Also the processing signals with presentation video is sent to display unit 126, so that the Visual Display of image to be provided.Definitely, these MR signals are filled or are constituted through Fourier transform to obtain the k space of visual image.These processing signals with presentation video are sent to display unit 126 then.
Be appreciated that top description is intended to explanation, and unrestricted.For example, the foregoing description (and/or its many aspects) can combination with one another use.In addition, under the prerequisite that does not deviate from their scopes, can carry out many modifications to adapt to the concrete condition or the material of various embodiments instruction.Though the size of material described herein and type are intended to define the parameter of various embodiments, they be anything but the restriction and only be the demonstration.During description on look back, those skilled in the art will be apparent to many other embodiment.Therefore, should confirm the scope of these various embodiments with reference to accompanying claims together with the full breadth of the equivalent of this type of claim mandate.In accompanying claims, term " comprises " and " wherein " " comprises " with corresponding term and the literal equivalence of English of " therein " is used.And in accompanying claims, term " first ", " second " and " the 3rd " etc. are not intended to hint the numerical value requirement of its object only with marking.And; Only if phrase " device; it is used for " is used in this type of claim restriction clearly; After connect the function statement of no further structure and till this situation, otherwise the restriction of accompanying claims is with the format writing of device+function, and explains for the 6th section of the 112nd article based on united states patent law unintentionally.
This written description usage example comes openly to comprise the present invention of optimal mode, and also makes those skilled in the art can put into practice the present invention, comprises making and using any device or system and carry out the method for any combination.The patentable scope of the present invention is confirmed by claim, and can be comprised other example that those skilled in the art expect.If this type of other example has the structural element same invariably with the claim literal language, if perhaps they comprise with the claim word language not having the different equivalent structure key element of essence, then they are defined as within the scope of claim.

Claims (21)

1. superconducting coil support arrangement comprises:
Superconducting coil;
At least one support column, the jar that it supports said superconducting coil and is defined for the storing therein cooling fluid; And
A plurality of cooling water pipes, it is coupled to said superconducting coil and is connected to said at least one support column, and said a plurality of cooling water pipes are configured to transmit said cooling fluid through it.
2. superconducting coil support arrangement according to claim 1, wherein, said superconducting coil comprises a plurality of coils, and wherein, said a plurality of cooling water pipes are coupled to the outer peripheral edges of said a plurality of coils.
3. superconducting coil support arrangement according to claim 1; Wherein, Said cooling fluid comprises helium; And said superconducting coil support arrangement also comprises a plurality of support columns, wherein, said support column at least one of them limit liquid helium jar and said support column one of them limits helium jar at least.
4. superconducting coil support arrangement according to claim 1 also comprises a plurality of cooling water pipes in advance, and it separates with said cooling water pipe and has a cooling fluid of flowing through wherein.
5. superconducting coil support arrangement according to claim 4, wherein, the said cooling fluid in said a plurality of cooling water pipes is a liquid helium, and the said cooling fluid in the said cooling water pipe in advance is non-helium liquid.
6. superconducting coil support arrangement according to claim 4, wherein, said a plurality of cooling water pipes in advance comprise rigid pipe, it is configured to along said at least one support column said superconducting coil that aligns.
7. superconducting coil support arrangement according to claim 1 also comprises heat shield and round a plurality of heat shield cooling water pipes of the periphery of said heat shield.
8. superconducting coil support arrangement according to claim 7 also comprises the fluid partitioning device, and it is connected to said a plurality of cooling water pipes (i) condenser again of cold head or (ii) is directly connected to said condenser again through said heat shield cooling water pipe.
9. superconducting coil support arrangement according to claim 1, wherein, said a plurality of cooling water pipes are connected to the condenser again of cold head, and wherein, said cold head comprises one of them of pulse tube cooler type cold head or 4K Gifford-McMahon (GM) type cold head.
10. superconducting coil support arrangement according to claim 1; Also comprise a plurality of support columns; Wherein, one of them and the said superconducting coil interference engagement at least of said support column, and said support column one of them is coupled to said superconducting coil enduringly at least.
11. a multistage cooling that is used for superconducting magnet arranges that said multistage cooling is arranged and comprised:
A plurality of liquid cools jars wherein have cooling fluid;
A plurality of cooling water pipes, it is coupled to the coil of said superconducting magnet;
Cold head, it is configured to the cooling fluid of boiling is condensed again;
Heat shield; And
The fluid partitioning device, it is connected between said a plurality of cooling water pipe, and (i) is directly connected to said cold head or (ii) be connected to said cold head through said heat shield.
12. multistage cooling according to claim 11 arranges that also comprise at least one gas tank, it is connected between said a plurality of cooling water pipe and the said fluid partitioning device.
13. multistage cooling according to claim 11 arranges that wherein, said a plurality of cooling tanks are defined for the structure support of the said coil of said superconducting magnet.
14. multistage cooling according to claim 11 arranges that wherein, said a plurality of cooling water pipes are coupled to the outer peripheral edges of said coil.
15. multistage cooling according to claim 11 is arranged, also comprises a plurality of in advance cooling water pipes adjacent with said coil.
16. multistage cooling according to claim 11 is arranged, also comprises a plurality of coils, it is round said heat shield and be disposed for the convection current cooling.
17. multistage cooling according to claim 11 arranges that wherein, said fluid partitioning device limits the two-stage cooling configuration in the thermal siphon cooling circuit.
18. multistage cooling according to claim 11 arranges that wherein, said coil comprises magnetic resonance imaging (MRI) coil.
19. multistage cooling according to claim 11 arranges that wherein, said fluid partitioning device is configured to optionally control fluid stream.
20. a method that is used to cool off the coil of superconducting magnet, said method comprises:
A plurality of cooling water pipes are coupled to the coil of said superconducting magnet; And
Constitute at least one coil supports body, have the cooling fluid jar therein and be configured to support the said coil of said superconducting magnet.
21. method according to claim 20; Also comprise: a plurality of cooling water pipes are coupled to heat shield and the fluid partitioning device is provided, and said fluid partitioning device is connected to said a plurality of cooling water pipes and the said a plurality of cooling water pipes that (ii) are coupled to said heat shield that (i) is coupled to the said coil of said superconducting magnet.
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